Once you have attuned to the potion, you have ingested the potion. The elf slave dies, absorbing their soul and their body transforming into a flock of catfish.

While attuned to the potion, its wonderfully thick and oily liquids sloshing around your insides, you gain immunity to all damages, conditions and all your abilities scores are 30. In addition, you can cast wish at will.

After 1 year, the potion wears off and you take damage equal to the amount of damage you would have taken over the year if you didn't have any immunities from this potion, you take 1d100 damage for each time you cast wish with this potion in the last year, and all your ability scores are set to 1. You also lose your sanity and the ability to walk on two feet and speak. 

Notes: You must let the potion trickle into your mouth torturously slowly over the course of an elf slave's lifetime